 The constant occurrence of the chromite in rounded masses of varying proportions near the contact of the peridotite with the gneiss and its occurrence in the fresh, as well as the altered, peridotite indicate that the chromite has been held in solution...  Bulletin of the United States Geological Survey - Page 178by Geological Survey (U.S.) - 1910Full view - About this book
 | Science - 1899 - 1030 pages
...little found, and where we find the large deposits of the corundum there is a scarcity of chromite. This constant occurrence of the chromite in rounded masses...near the contact of the peridotite with the gneiss, its occurrence in the fresh as well as in the altered peridotite, indicate that the chromite has been... | |
 | Joseph Hyde Pratt - Corundum - 1901 - 758 pages
...origin of the corundum in the peridotite rocks, and have accepted the theory that the corundum was held in solution in the molten mass of the peridotite...when it was intruded into the country rock, and that as the mass began to cool it was among the first minerals to separate. In these molten magmas the more... | |
 | Geology - 1905 - 918 pages
...region. THKOKY OF ORIGIN IN 1'EHIDOTITE. The theory advanced in this paper is that the corundum was held in solution in the molten mass of the peridotite...and that it separated out among the first minerals as the mass began to cool. The peridotite magma holding in solution the chemical elements of the different... | |
 | Joseph Hyde Pratt, Joseph Volney Lewis - Corundum - 1905 - 556 pages
...noticeable amount of chromite;" (2) "analyses of the peridotite show 0.5 per cent of chromic oxide." The constant occurrence of the chromite in rounded...and that it separated out among the first minerals as this mass began to cool. As has been said on page 344, the peridotite magma, holding in solution... | |
 | Joseph Hyde Pratt - Corundum - 1906 - 236 pages
...region. THEORY OF ORIGIN IN PERIDOTITE. The theory advanced in this paper is that the corundum was held in solution in the molten mass of the peridotite...and that it separated out among the first minerals as the mass began to cooI. The peridotite magma holding in solution the chemical elements of the different... | |
 | Mineral industries - 1908 - 1172 pages
...constant occurrence of the chromite in rounded masses of varying size near the contact of the periclotite with the gneiss, and its occurrence in the fresh, as well as in the altered peridotite, would indicate that the chromite was held in solution in the molten mass... | |
 | Charles Willard Hayes - Coal - 1910 - 764 pages
...deposits of chromite in North Carolina occur in peridotite rock near the contact of this rock with the inclosing gneiss and where there is but a small amount...and that it separated out among the first minerals as this mass began to cool. ยป Op. cit. As has been said, the peridotite (dunite) magma, holding in... | |
 | Corundum - 1915 - 736 pages
...of corundum in the United States says: "The theory advanced in this paper is that the corundum was held in solution in the molten mass of the peridotite...when it was intruded into the country rock, and that as the mass began to cool, it was among the first minerals to separate. In these molten magmas, the... | |
 | Alfred Ernest Barlow - Corundum - 1915 - 560 pages
...of corundum in the United States says: "The theory advanced in this paper is that the corundum was held in solution in the molten mass of the peridotite...when it was intruded into the country rock, and that as the mass began to cool, it was among the first minerals to separate. In these molten magmas, the... | |
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